Natural organic matter from the dispersion train of gold sulfide tailings: group composition and fractionation of elements: case study of Ursk Tailings, Kemerovo Region, Siberia

IF 1 4区地球科学 Q3 GEOCHEMISTRY & GEOPHYSICS Geochemistry-Exploration Environment Analysis Pub Date : 2020-12-15 DOI:10.1144/geochem2020-052

I. N. Myagkaya, B. Saryg-ool, O. N. Surkov, S. Zhmodik, E. Lazareva, O. Taran

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引用次数: 2

Abstract

We study the contents of elements and group composition in natural organic matter (NOM) that interacts with acid mine drainage (АMD) and high-sulfide tailings at the Ursk site (southwestern Siberia, Russia). AMD causes biomass changes in NOM, related changes in the composition of fractions, and hydrolysis of hydrolyzable compounds; it increases the water-soluble fraction and maintains depolymerization of humic acids to fulvic acids, but exerts no effect on substances soluble in organics (bitumen) or on poorly hydrolyzable compounds. Accumulation of inorganic elements and precipitation of minerals obscure the true fraction composition of NOM: the superposed mineral component contributes significantly to the water-soluble, humic acid, hydrolyzable and non-hydrolyzable fractions, and may reach 26.4% per total of all fractions. Rock-forming and potentially toxic elements partition among NOM fractions and predominate in the water-soluble fraction. The contents of Au and Ag are the highest in the fractions of humic acids and hydrolyzable compounds but are lower in the non-hydrolyzable residue. The obtained data have implications for possible migration of potentially toxic elements and noble metals and thus for remediation of polluted areas. The observed fractionation of Ag and Au in NOM helps us to understand the mechanisms of their distribution in organic-bearing environments, such as peatlands or coal basins.

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硫化金尾矿分散系中的天然有机物：组分和元素分馏——以西伯利亚克麦罗沃地区乌尔斯克尾矿为例

我们研究了天然有机物（NOM）中的元素含量和族组成，这些有机物与Ursk矿场（俄罗斯西伯利亚西南部）的酸性矿山排水（АMD）和高硫化物尾矿相互作用。AMD导致NOM的生物量变化、组分组成的相关变化以及可水解化合物的水解；它增加了腐殖酸的水溶性组分，并保持了腐殖酸向黄腐酸的解聚，但对可溶于有机物（沥青）或水解性差的化合物没有影响。无机元素的积累和矿物的沉淀掩盖了NOM的真实组分组成：叠加的矿物组分对水溶性、腐殖酸、可水解和不可水解组分的贡献很大，可能达到所有组分的26.4%。岩石形成和潜在毒性元素在NOM组分中分配，并在水溶性组分中占主导地位。腐殖酸和可水解化合物组分中Au和Ag含量最高，而不可水解残渣中Au、Ag含量较低。所获得的数据对潜在有毒元素和贵金属的可能迁移具有启示，从而对污染地区的修复具有启示。NOM中观察到的Ag和Au的分馏有助于我们了解它们在泥炭地或煤盆地等含有机环境中的分布机制。

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来源期刊

Geochemistry-Exploration Environment Analysis 地学-地球化学与地球物理

CiteScore

3.60

自引率

16.70%

发文量

审稿时长

1 months

期刊介绍： Geochemistry: Exploration, Environment, Analysis (GEEA) is a co-owned journal of the Geological Society of London and the Association of Applied Geochemists (AAG). GEEA focuses on mineral exploration using geochemistry; related fields also covered include geoanalysis, the development of methods and techniques used to analyse geochemical materials such as rocks, soils, sediments, waters and vegetation, and environmental issues associated with mining and source apportionment. GEEA is well-known for its thematic sets on hot topics and regularly publishes papers from the biennial International Applied Geochemistry Symposium (IAGS). Papers that seek to integrate geological, geochemical and geophysical methods of exploration are particularly welcome, as are those that concern geochemical mapping and those that comprise case histories. Given the many links between exploration and environmental geochemistry, the journal encourages the exchange of concepts and data; in particular, to differentiate various sources of elements. GEEA publishes research articles; discussion papers; book reviews; editorial content and thematic sets.